Latest Blog

Explains how direct device assignment changes the VM trust boundary, how DMA and interrupt remapping confine hardware, and why groups, PCIe topology, firmware, and reset support still matter.

Explains the path from virtual disks to physical device queues, why one VM can delay others, and how queue depth, storage media, QoS, and workload separation change latency.

Explains the difference between application quiesce and hypervisor stun, how memory capture and delta files affect pause time, and why consolidation can cause a later interruption.

Explains the difference between virtual and physical capacity, first-write allocation, guest discard, snapshot growth, and the failure boundary when a shared VM datastore fills.

Explains how container workloads depend on host time for token validation, cron scheduling, distributed ordering, monitoring, and backup automation.

Explains how parity maintenance creates read-modify-write amplification, broad disk scans, degraded reconstruction, queue pressure, and foreground latency.

Explains how bind mounts cross the container filesystem boundary, how read-write access expands blast radius, and how path scope, UID/GID, SELinux, and sockets change risk.

Explains ZIL records, transaction groups, crash replay, SLOG latency, power-loss protection, and the limits of intent-log recovery.